[Healeys] Hot idle issue
healey.nut at gmail.com
Fri Jun 22 22:42:26 MDT 2018
You only really get vapor lock if the fuel line is over or next to the
exhaust. The BJ8 has most of these issues sorted out (i.e. the BN1 has
some problems with it because the fuel pump is mounted over the exhaust).
I had a similar problem with my BJ8 and I fixed it when I replaced the
throttle shaft teflon bushes in the HD8's. Apparently when the car was
getting hot, the old HD8 bushes were worn out and the air gap would get big
leaning out the mixture and causing stalling symptoms. Usually revving
won't fix vapor lock, so you could have worn bushes.
On Sat, Jun 23, 2018 at 11:27 AM i erbs <eyera3000 at gmail.com> wrote:
> I am thinking vapour lock
> Ira Erbs
> Portland, OR
> typos and artifacts are the fault of my phone
> On Fri, Jun 22, 2018, 4:59 PM Roger Grace <roggrace at telus.net> wrote:
>> My BJ8 does the same.
>> I may be wrong, but think it may have something to do with engine
>> compartment temp at the carb intake area; air becomes less dense and hence
>> less O2 for combustion and mixture is now too rich at the idle setting and
>> starts to splutter.
>> I have put in one of those cheepo home wireless temp monitors (Wallmart)
>> in that area; in cabin able to monitor the engine compartment temp as well
>> as the air temp.
>> Seems to start when compartment goes approaches 150F plus when idling on
>> a hot day – particularly when the oil is hot after a run. Temp rises quite
>> quickly when you stop. Also oil temp.
>> One of the AH problems is that there does not seem to have a decent exit
>> path for the air entering. You can blow all you want through the rad but
>> you have to get the air out efficiently to keep engine compartment cooler.
>> Don't have a solution but maybe a pair of boat bilge fans ? or redirect the
>> cold air intake to carb area ?
>> BTW have recently installed an electric water pump to improve cooling
>> capability at idle – separate topic.
>> *From:* i erbs
>> *Sent:* Friday, June 22, 2018 11:51 AM
>> *To:* Ahealey help
>> *Subject:* [Healeys] Hot idle issue
>> Had an idle issue when car got up to normal temp about 175 or so. Had the
>> carbs looked at. Found low float level. Fixing that fixed idle issue, but
>> not it's back when car runs above 195 in hot day stop and go traffic. New
>> flex fan. Rotted out extra core radiator. New su fuel pump. Car idles, then
>> rpms fall and car stalls unless I pull out choke or rev engine. Vapor
>> Any ideas?
>> Ira Erbs
>> Portland, OR
>> typos and artifacts are the fault of my phone
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